12608781 has 12 divisors (see below), whose sum is σ = 17860032. Its totient is φ = 7910848.

The previous prime is 12608767. The next prime is 12608789. The reversal of 12608781 is 18780621.

It is a happy number.

It is not a de Polignac number, because 12608781 - 2⁹ = 12608269 is a prime.

It is a super-2 number, since 2×12608781² = 317962716611922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12608789) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6405 + ... + 8138.

It is an arithmetic number, because the mean of its divisors is an integer number (1488336).

Almost surely, 2^12608781 is an apocalyptic number.

It is an amenable number.

12608781 is a deficient number, since it is larger than the sum of its proper divisors (5251251).

12608781 is a wasteful number, since it uses less digits than its factorization.

12608781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14580 (or 14563 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 12608781 is about 3550.8845376892. The cubic root of 12608781 is about 232.7507204001.

The spelling of 12608781 in words is "twelve million, six hundred eight thousand, seven hundred eighty-one".